139213512 has 32 divisors (see below), whose sum is σ = 386704800. Its totient is φ = 46404432.

The previous prime is 139213511. The next prime is 139213517. The reversal of 139213512 is 215312931.

139213512 is a `hidden beast` number, since 139 + 2 + 13 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (139213511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322038 + ... + 322469.

It is an arithmetic number, because the mean of its divisors is an integer number (12084525).

Almost surely, 2^139213512 is an apocalyptic number.

139213512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139213512 is an abundant number, since it is smaller than the sum of its proper divisors (247491288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139213512 is a wasteful number, since it uses less digits than its factorization.

139213512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644522 (or 644512 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 139213512 is about 11798.8775737356. The cubic root of 139213512 is about 518.2752421833.

The spelling of 139213512 in words is "one hundred thirty-nine million, two hundred thirteen thousand, five hundred twelve".